Ecology

Exam 2

9 cards·by alecia

N(sub 1)=

N(sub 0) + B + I - D- E

Gause's paramecium experiment

to model population growth. added food at a constant rate and measured pop growth. exponential growth then levels off

negative density dependence

when the population growth rate decreases with increasing N (in plants & wildebeasts)

logistic growth equation

(dN/dt)=rN(1-(N/K))

carrying capacity

the total amount of space that could be occupied

damped oscillation

in the discrete logistics model graph, will eventually reach equilibrium

positive density dependence

when the population growth rate increases with increasing N (beginning of exponential growth)

allee effect

when birth rates fall below dealth rates at low population densities. population doomed to extinction

reason for the allee effect

they cant find mates